Operator '==' cannot be applied to operands of type 'int' and 'string'

Question

0.00/5 (No votes)

See more:

Hi, I'm Matt and I'm kinda new to c#. I've been coding with GML(Game Making Language) and Python. I wanted to learn a new coding language, so I started learning c# less than a week ago.

I've learnt my c# from a tutorial series(Bob Tabor on MSDN) and I wanted to try and make my own program - a Lottery Game! If you guess the randomly generated number between 1 and 3 you win the lottery!

The problem I get so far it says Operator '==' cannot be applied to operands of type 'int' and 'string'. I know it is with converting the userValue to an integer, but I don't know how to do it D:

My code is below.

What I have tried:

Random random = new Random(); // Importing the random function
           int number = random.Next(1,3);

           // Stating the game name
           Console.WriteLine("LOTTERY GAME");
           Console.WriteLine("--------------");
           Console.WriteLine("Pick a number: 1, 2 or 3.");
           string userValue = Console.ReadLine();

           string message = (userValue == number) ? "You won the Lottery!" : "Sorry, you didn't get the right number. Better luck next time!";
           Console.WriteLine("{0} The number you typed was {1}.", message, userValue);
           Console.ReadLine();

Posted 8-Dec-17 9:13am

newtinn

Updated 8-Dec-17 9:45am

Add a Solution

Comments

Richard MacCutchan 8-Dec-17 16:29pm

You cannot compare a string to an int, they are totally different types. You need to study the basics of C#.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2017-12-08T09:45:00

Use int.TryParse[^] to attempt to convert the string to an int. You'll also need to account for cases where the user doesn't type a valid number.

C#

string userText = Console.ReadLine();

int userValue;
while (!int.TryParse(userText, out userValue))
{
    Console.WriteLine("Sorry, I didn't understand that.");
    Console.WriteLine("Pick a number: 1, 2 or 3.");
    userText = Console.ReadLine();
}

string message = (userValue == number) ? "You won the Lottery!" : "Sorry, you didn't get the right number. Better luck next time!";
Console.WriteLine("{0} The number you typed was {1}.", message, userValue);
Console.ReadLine();